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新增视频流播放

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feiyangqingyun
2020-04-22 14:37:21 +08:00
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commit 08132be41f
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vlcdemo/vlc/vlc3/include/plugins/vlc_tls.h Normal file
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/*****************************************************************************
* vlc_tls.h:
*****************************************************************************
* Copyright (C) 2004-2016 Rémi Denis-Courmont
* Copyright (C) 2005-2006 VLC authors and VideoLAN
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifndef VLC_TLS_H
# define VLC_TLS_H
/**
* \ingroup net
* \defgroup transport Transport layer sockets
* Network stream abstraction
*
* Originally intended for the TLS protocol (Transport Layer Security),
* the Transport Layer Sockets now provides a generic abstraction
* for connection-oriented full-duplex I/O byte streams, such as TCP/IP sockets
* and TLS protocol sessions.
*
* @{
* \file
* Transport layer functions
*/
# include <vlc_network.h>
/** Transport layer socket */
typedef struct vlc_tls
{
int (*get_fd)(struct vlc_tls *);
ssize_t (*readv)(struct vlc_tls *, struct iovec *, unsigned);
ssize_t (*writev)(struct vlc_tls *, const struct iovec *, unsigned);
int (*shutdown)(struct vlc_tls *, bool duplex);
void (*close)(struct vlc_tls *);
struct vlc_tls *p;
} vlc_tls_t;
/**
* \defgroup tls Transport Layer Security
* @{
*/
/**
* TLS credentials
*
* This structure contains the credentials for establishing TLS sessions.
* This includes root Certificate Authorities (on client side),
* trust and cryptographic parameters,
* public certificates and private keys.
*/
typedef struct vlc_tls_creds
{
VLC_COMMON_MEMBERS
module_t *module;
void *sys;
vlc_tls_t *(*open)(struct vlc_tls_creds *, vlc_tls_t *sock,
const char *host, const char *const *alpn);
int (*handshake)(struct vlc_tls_creds *, vlc_tls_t *session,
const char *hostname, const char *service,
char ** /*restrict*/ alp);
} vlc_tls_creds_t;
/**
* Allocates TLS credentials for a client.
* Credentials can be cached and reused across multiple TLS sessions.
*
* @return TLS credentials object, or NULL on error.
**/
VLC_API vlc_tls_creds_t *vlc_tls_ClientCreate(vlc_object_t *);
/**
* Allocates server TLS credentials.
*
* @param cert path to an x509 certificate (required)
* @param key path to the PKCS private key for the certificate,
* or NULL to use cert path
*
* @return TLS credentials object, or NULL on error.
*/
VLC_API vlc_tls_creds_t *vlc_tls_ServerCreate(vlc_object_t *, const char *cert,
const char *key);
static inline int vlc_tls_SessionHandshake (vlc_tls_creds_t *crd,
vlc_tls_t *tls)
{
return crd->handshake(crd, tls, NULL, NULL, NULL);
}
/**
* Releases TLS credentials.
*
* Releases data allocated with vlc_tls_ClientCreate() or
* vlc_tls_ServerCreate().
*
* @param srv object to be destroyed (or NULL)
*/
VLC_API void vlc_tls_Delete(vlc_tls_creds_t *);
/**
* Initiates a client TLS session.
*
* Initiates a Transport Layer Security (TLS) session as the client side, using
* trusted root CAs previously loaded with vlc_tls_ClientCreate().
*
* This is a blocking network operation and may be a thread cancellation point.
*
* @param creds X.509 credentials, i.e. set of root certificates of trusted
* certificate authorities
* @param sock socket through which to establish the secure channel
* @param hostname expected server name, used both as Server Name Indication
* and as expected Common Name of the peer certificate [IN]
* @param service unique identifier for the service to connect to
* (only used locally for certificates database) [IN]
* @param alpn NULL-terminated list of Application Layer Protocols
* to negotiate, or NULL to not negotiate protocols [IN]
* @param alp storage space for the negotiated Application Layer
* Protocol or NULL if negotiation was not performed [OUT]
*
* @note The credentials must remain valid until the session is finished.
*
* @return TLS session, or NULL on error.
**/
VLC_API vlc_tls_t *vlc_tls_ClientSessionCreate(vlc_tls_creds_t *creds,
vlc_tls_t *sock,
const char *host,
const char *service,
const char *const *alpn,
char **alp);
/**
* Creates a TLS server session.
*
* Allocates a Transport Layer Security (TLS) session as the server side, using
* cryptographic keys pair and X.509 certificates chain already loaded with
* vlc_tls_ServerCreate().
*
* Unlike vlc_tls_ClientSessionCreate(), this function does not perform any
* actual network I/O. vlc_tls_SessionHandshake() must be used to perform the
* TLS handshake before sending and receiving data through the TLS session.
*
* This function is non-blocking and is not a cancellation point.
*
* @param creds server credentials, i.e. keys pair and X.509 certificates chain
* @param alpn NULL-terminated list of Application Layer Protocols
* to negotiate, or NULL to not negotiate protocols
*
* @return TLS session, or NULL on error.
*/
VLC_API vlc_tls_t *vlc_tls_ServerSessionCreate(vlc_tls_creds_t *creds,
vlc_tls_t *sock,
const char *const *alpn);
/** @} */
/**
* Destroys a TLS session down.
*
* All resources associated with the TLS session are released.
*
* If the session was established successfully, then shutdown cleanly, the
* underlying socket can be reused. Otherwise, it must be closed. Either way,
* this function does not close the underlying socket: Use vlc_tls_Close()
* instead to close it at the same.
*
* This function is non-blocking and is not a cancellation point.
*/
VLC_API void vlc_tls_SessionDelete (vlc_tls_t *);
static inline int vlc_tls_GetFD(vlc_tls_t *tls)
{
return tls->get_fd(tls);
}
/**
* Receives data through a socket.
*
* This dequeues incoming data from a transport layer socket.
*
* @param buf received buffer start address [OUT]
* @param len buffer length (in bytes)
* @param waitall whether to wait for the exact buffer length (true),
* or for any amount of data (false)
*
* @note At end of stream, the number of bytes returned may be shorter than
* requested regardless of the "waitall" flag.
*
* @return the number of bytes actually dequeued, or -1 on error.
*/
VLC_API ssize_t vlc_tls_Read(vlc_tls_t *, void *buf, size_t len, bool waitall);
/**
* Receives a text line through a socket.
*
* This dequeues one line of text from a transport layer socket.
* @return a heap-allocated nul-terminated string, or NULL on error
*/
VLC_API char *vlc_tls_GetLine(vlc_tls_t *);
/**
* Sends data through a socket.
*/
VLC_API ssize_t vlc_tls_Write(vlc_tls_t *, const void *buf, size_t len);
/**
* Shuts a connection down.
*
* This sends the connection close notification.
*
* If the TLS protocol is used, this provides a secure indication to the other
* end that no further data will be sent. If using plain TCP/IP, this sets the
* FIN flag.
*
* Data can still be received until a close notification is received from the
* other end.
*
* @param duplex whether to stop receiving data as well
* @retval 0 the session was terminated securely and cleanly
* (the underlying socket can be reused for other purposes)
* @return -1 the session was terminated locally, but either a notification
* could not be sent or received (the underlying socket cannot be
* reused and must be closed)
*/
static inline int vlc_tls_Shutdown(vlc_tls_t *tls, bool duplex)
{
return tls->shutdown(tls, duplex);
}
/**
* Closes a connection and its underlying resources.
*
* This function closes the transport layer socket, and terminates any
* underlying connection. For instance, if the TLS protocol is used over a TCP
* stream, this function terminates both the TLS session, and then underlying
* TCP/IP connection.
*
* To close a connection but retain any underlying resources, use
* vlc_tls_SessionDelete() instead.
*/
static inline void vlc_tls_Close(vlc_tls_t *session)
{
do
{
vlc_tls_t *p = session->p;
vlc_tls_SessionDelete(session);
session = p;
}
while (session != NULL);
}
/**
* Creates a transport-layer stream from a socket.
*
* Creates a transport-layer I/O stream from a socket file descriptor.
* Data will be sent and received directly through the socket. This can be used
* either to share common code between non-TLS and TLS cases, or for testing
* purposes.
*
* This function is not a cancellation point.
*
* @deprecated This function is transitional. Do not use it directly.
*/
VLC_API vlc_tls_t *vlc_tls_SocketOpen(int fd);
/**
* Creates a connected pair of transport-layer sockets.
*/
VLC_API int vlc_tls_SocketPair(int family, int protocol, vlc_tls_t *[2]);
struct addrinfo;
/**
* Creates a transport-layer stream from a struct addrinfo.
*
* This function tries to allocate a socket using the specified addrinfo
* structure. Normally, the vlc_tls_SocketOpenTCP() function takes care of
* this. But in some cases, it cannot be used, notably:
* - if the remote destination is not resolved (directly) from getaddrinfo(),
* - if the socket type is not SOCK_STREAM,
* - if the transport protocol is not TCP (IPPROTO_TCP), or
* - if TCP Fast Open should be attempted.
*
* @param ai a filled addrinfo structure (the ai_next member is ignored)
* @param defer_connect whether to attempt a TCP Fast Open connection or not
*/
VLC_API vlc_tls_t *vlc_tls_SocketOpenAddrInfo(const struct addrinfo *ai,
bool defer_connect);
/**
* Creates a transport-layer TCP stream from a name and port.
*
* This function resolves a hostname, and attempts to establish a TCP/IP
* connection to the specified host and port number.
*
* @note The function currently iterates through the addrinfo linked list.
* Future versions may implement different behaviour (e.g. RFC6555).
*
* @return a transport layer socket on success or NULL on error
*/
VLC_API vlc_tls_t *vlc_tls_SocketOpenTCP(vlc_object_t *obj,
const char *hostname, unsigned port);
/**
* Initiates a TLS session over TCP.
*
* This function resolves a hostname, attempts to establish a TCP/IP
* connection to the specified host and port number, and finally attempts to
* establish a TLS session over the TCP/IP stream.
*
* See also vlc_tls_SocketOpenTCP() and vlc_tls_SessionCreate().
*/
VLC_API vlc_tls_t *vlc_tls_SocketOpenTLS(vlc_tls_creds_t *crd,
const char *hostname, unsigned port,
const char *service,
const char *const *alpn, char **alp);
VLC_DEPRECATED
static inline vlc_tls_t *
vlc_tls_ClientSessionCreateFD(vlc_tls_creds_t *crd, int fd, const char *host,
const char *srv, const char *const *lp, char **p)
{
vlc_tls_t *sock = vlc_tls_SocketOpen(fd);
if (unlikely(sock == NULL))
return NULL;
vlc_tls_t *tls = vlc_tls_ClientSessionCreate(crd, sock, host, srv, lp, p);
if (unlikely(tls == NULL))
free(sock);
return tls;
}
/** @} */
#endif